In an 84 s interval. 959 hailstones strike a glass window of area 1.202 mº at an angle 44°

to the window surface. Each hailstone has a

mass of 5 g and speed of 11.4 m/s.

If the collisions are elastic, find the average

force on the window.

Answer in units of N.

Answer in units of N

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? your

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.